# Converting a 1970s Portable Television into a Composite Video Monitor

**URL:** <https://scanalyst.fourmilab.ch/t/converting-a-1970s-portable-television-into-a-composite-video-monitor/3568>\
**Category:** Continuity\
**Tags:** electronics, video, composite-video\
**Created:** [7 August 2023 12:50 UTC](https://scanalyst.fourmilab.ch/t/converting-a-1970s-portable-television-into-a-composite-video-monitor/3568 "2023-08-07T12:50:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![johnwalker](https://scanalyst.fourmilab.ch/user_avatar/scanalyst.fourmilab.ch/johnwalker/32/17415_2.png) [@johnwalker](https://scanalyst.fourmilab.ch/u/johnwalker)\
**Post date:** [7 August 2023 12:50 UTC](https://scanalyst.fourmilab.ch/t/converting-a-1970s-portable-television-into-a-composite-video-monitor/3568/1 "2023-08-07T12:50:10Z")

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[![](https://scanalyst.fourmilab.ch/uploads/default/original/2X/6/688e71955048122c4ab850db8e2a6a5b1e3699ec.jpeg "Adding composite video and sound inputs to a 1976 TV (Panasonic TR-525)") ](https://www.youtube.com/watch?v=IkegnkKuJGw)

If you know the input signal is monochrome, removing the filter that takes out the colour signal improves horizontal resolution, but when displaying a signal with chroma information, it’s required to avoid noise in the luminance channel.

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**Author:** ![CTLaw](https://scanalyst.fourmilab.ch/user_avatar/scanalyst.fourmilab.ch/ctlaw/32/42_2.png) [@CTLaw](https://scanalyst.fourmilab.ch/u/CTLaw)\
**Post date:** [7 August 2023 13:30 UTC](https://scanalyst.fourmilab.ch/t/converting-a-1970s-portable-television-into-a-composite-video-monitor/3568/2 "2023-08-07T13:30:52Z")

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I had a B&W:

[https://www.worthpoint.com/worthopedia/vintage-realistic-portavision-micro-74494412](https://www.worthpoint.com/worthopedia/vintage-realistic-portavision-micro-74494412)